Post by Yogi B on Oct 24, 2020 6:40:51 GMT -5
Here's a wiring diagram for my HHH LP wiring idea as recently posted in antigua's Analysis of pickups from a Chinese Gibson style guitar thread. It normally provides the standard 2V-2T control configuration of a two pickup LP, but utilises push-pull (or push-push) volume pots to swap in the remaining middle pickup.
Here is the simplified version which omits the phase switching, but does come with some questionable use of 4-conductor wire
(this diagram diagram also differs from my previous schematic in terms of terminal assignment, notably in the way that I've shown the tone pots to be wired):
I hope the "Control Assignment" columns of the included truth table make sense: with both P/Ps down, we have the regular assignment of LP-style controls (with dependent volumes & modern tones); switching either P/P into the up position replaces the pickup that would normally be connected to that volume control with the middle pickup instead (i.e. if the bridge P/P is up, the middle pickup replaces the bridge pickup); both P/Ps in the up position gives all three pickups in parallel, in this setting both tone controls are always connected despite the toggle switch position, whereas the volume controls now work as master volumes for the B+M+N selection but are selected with the toggle switch as normal.
N.B. this does mean that with all three pickups selected (both P/Ps up) the centre position of the toggle switch places the volumes directly in parallel with each other. The behaviour of this is a little odd, but is quite similar to the way that the two dependent volumes interact in the other centre positions so it shouldn't be too surprising.
(Although envisioned for a three humbucker LP/SG style guitar, conceivably this could be converted for use with a Strat style guitar by replacing the toggle switch with a 3-way blade switch and combining the tone controls into either a dual-gang or concentric pot.)
Here is the simplified version which omits the phase switching, but does come with some questionable use of 4-conductor wire
(this diagram diagram also differs from my previous schematic in terms of terminal assignment, notably in the way that I've shown the tone pots to be wired):I hope the "Control Assignment" columns of the included truth table make sense: with both P/Ps down, we have the regular assignment of LP-style controls (with dependent volumes & modern tones); switching either P/P into the up position replaces the pickup that would normally be connected to that volume control with the middle pickup instead (i.e. if the bridge P/P is up, the middle pickup replaces the bridge pickup); both P/Ps in the up position gives all three pickups in parallel, in this setting both tone controls are always connected despite the toggle switch position, whereas the volume controls now work as master volumes for the B+M+N selection but are selected with the toggle switch as normal.
N.B. this does mean that with all three pickups selected (both P/Ps up) the centre position of the toggle switch places the volumes directly in parallel with each other. The behaviour of this is a little odd, but is quite similar to the way that the two dependent volumes interact in the other centre positions so it shouldn't be too surprising.
(Although envisioned for a three humbucker LP/SG style guitar, conceivably this could be converted for use with a Strat style guitar by replacing the toggle switch with a 3-way blade switch and combining the tone controls into either a dual-gang or concentric pot.)